Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint, idempotentHint, destructiveHint false, and openWorldHint, so the safety profile is covered. The description adds scope by naming the tracked change categories, but it does not describe ordering, pagination, or return shape beyond what the annotations and params imply.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

A single sentence with zero waste, front-loading the scope of changes. It is appropriately sized for the tool's low complexity.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a low-complexity read operation with rich annotations and full schema descriptions, the description conveys the tracked change types adequately. It omits sort order and pagination behavior, but the limit parameter and annotations cover enough for correct invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, and both parameters (limit, since) are fully documented in the input schema. The description adds no additional parameter meaning, syntax, or defaults, so the baseline of 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states the specific resource (day-to-day changes) and enumerates the change types returned (project status, launch dates, NORAD IDs, tracked launch NET/status). It is clear enough to distinguish from compute or upcoming-launch siblings, though it does not explicitly name or contrast those alternatives.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives no explicit when-to-use guidance, no alternatives, and no exclusions. The only usage context is implied by 'Day-to-day changes'; an agent must infer when to call this instead of upcoming_launches or compute tools.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.